Control of a digital communication system having a plurality of communication lines on which signals are transmitted and received is implemented using a variety of methods and systems. According to one embodiment of the present invention, a method is implemented where the signals are affected by interference during transmission and each of the communication lines has at least one transmitter and at least one receiver. A model is created of the interference characteristics due to the signals carried on the communication lines. Interference characteristics for a line are determined based on the model and actual signals carried on other communication lines different from the line for which the characteristics are being determined. Actual interference is compensated for on the communication line using the determined interference characteristics.

A signaling circuit having a selectable-tap equalizer. The signaling circuit includes a buffer, a select circuit and an equalizing circuit. The buffer is used to store a plurality of data values that correspond to data signals transmitted on a signaling path during a first time interval. The select circuit is coupled to the buffer to select a subset of data values from the plurality of data values according to a select value. The equalizing circuit is coupled to receive the subset of data values from the select circuit and is adapted to adjust, according to the subset of data values, a signal level that corresponds to a data signal transmitted on the signaling path during a second time interval.

Disclosed is a method for updating a list of radio stations that can be received by a receiver system including at least two radio receivers, the method including: determining a list of radio stations that can be received at a given instant, measuring the quality of a current radio signal, corresponding to a frequency selected and listened to, determining the ageing of the list of receivable radio stations, comparing the quality with a configurable threshold that can be upgraded at least as a function of the ageing of the list, if the quality exceeds the configurable threshold, deactivating the phase diversity filtering function and evaluating the change in the quality of the received signals and, as a function of the evaluation:automatically updating, orkeeping unchanged the list of receivable radio stations.

The invention relates to, among others, a network device (10, 11, 12) for an intercom network (13) for permitting an audio communication, in particular a duplex audio communication with other users (14a, 14b, 14c, 14d, 14e, 14f) of the intercom network, comprising a housing (33) and a communication module (20a, 20b) arranged therein or thereon, with which a radio link can be established for the transmission of audio signals to another user, wherein the radio link is subject to the DECT protocol. The speciality, among others, consists in that the network device (10, 11, 12) comprises a means (21) for preventing or reducing multipath interferences.

Systems and methods for extracting polarized sub-signals from a dual-polarized signal includes isolating the polarized sub-signals using one or more filters. When a single filter is used to derive a first sub-signal, analog interference cancellation may be used to derive the second sub-signal. When two filters are used, the first and second sub-signals may each be derived using a corresponding filter.

Systems, methods, and apparatus for reducing antenna multipath and Rayleigh fading are disclosed. In one or more embodiments, a disclosed method for reducing multipath and Rayleigh fading for an antenna comprises receiving, by a structure, at least one undesired electromagnetic (EM) signal. In one or more embodiments, the structure is mounted proximate the antenna. In at least one embodiment, the structure comprises absorber material and/or reflective material. In one or more embodiments, the antenna is mounted on top of the structure. In at least one embodiment, the structure further comprises a core, where the core is covered by the absorber material and/or the reflective material. In at least one embodiment, the core is in the shape of a sphere, a hemisphere, at least a portion of a sphere, an ellipsoid, a torus, a pyramid, a cube, a cuboid, a cylinder, a cone, a polyhedron, or a freeform shape.

An antenna distribution unit distributes an input RF signal comprised of multiple discrete antenna feeds to a plurality of electronic devices in communication therewith. The antenna distribution unit engages in three-way signal splitting across a pair of successive splitting stages in order to produce an even multiplicity of high-quality signals across nine output ports. By limiting signal splitting to two splitting stages and carefully selecting components to maintain series and parallel impedance, a high-fidelity output signal is produced having an essentially flat spectrum over the target frequency band. In particular, the antenna distribution unit is optimized for use in the distribution of signals within the TV VHF low band of 50 MHz to 88 MHz, the TV VHF high band of 175 MHz to 213 MHz, the TV UHF band of 470 MHz to 610 MHz, and the 900 band of 900 MHz to 1000 MHz.

A reception device according to an embodiment in a system that performs wireless communication while switching a frequency channel includes a channel selecting unit, a generation unit, and a determination unit. The channel selecting unit converts a received signal of the frequency channel into a channel signal of an intermediate frequency. The generation unit generates a received channel number in a predetermined scheme. The determination unit determines whether or not to save a signal used for azimuth estimation in a storage unit from the channel signal.

A radio frequency (RF) filter includes a signal conditioning circuit and a bandstop filter. The signal conditioning circuit receives a broadband RF signal that includes both a jamming signal at a jamming frequency and a signal of interest and generates a plurality of clock signals. Each of the plurality of clock signals has a substantially same frequency as the jamming frequency, but a different phase shift. The bandstop filter receives the RF signal and the plurality of clock signals. The bandstop filter attenuates signals within a bandstop centered at the frequency of the plurality of clock signals. A self-tuning N-path filter is provided.

Techniques are disclosed for self-interference signal cancellation. A hybrid self-interference cancellation (SIC) circuit is configured to be operatively coupled to a transmitter and a receiver, and includes a tunable time domain filter in series with a tunable frequency domain filter. The tunable time domain filter is configured to generate a time-domain multipath cancellation signal based on a first radio signal transmitted by the transmitter at a first frequency while the receiver is receiving a second radio signal at a second frequency. The first and second frequencies can be the same or different and have similar or different power levels at the antennas. The tunable frequency domain filter, which is in series with the tunable time domain filter, is configured to generate a frequency-domain cancellation signal based on the first radio signal while the receiver is receiving the second radio signal.